Why gran needs a heater

My amazing Grandpa is now ninety years old, he is still going strong. He has not had any major health complications in his entire life which is quite amazing. He has only had multiple surgeries, & they were both on his kneesā€¦ I cannot guess how healthy he is; My terrible Grandma was not so lucky! She developed ovarian cancer at the age of fifty-four, & he died about multiple years later. My Grandpa never remarried. He said that he could never prefer anyone else love he loved our Grandma. He lives all alone in a big, aged farm beach house that he built himself when he was only eighteen. It was a good beach house for numerous years, but it is quite hard to manage for him now. It is almost impossible to heat. He used to heat the locale with a wood stove, although he is not able to split wood anymore, & he refuses to let anyone else do it for him. He has 3 wall mounted natural gas furnaces in his house, & he thinks it is enough to keep the beach house warm. It undoubtedly is not though, then there is no heat at all in the bedroom, so it is love an ice box in there. Thankfully, the winters here are a little more mild than those up north, but it still gets below chilly sometimes during December & January. He still does his cooking in the bedroom even though there is no heat in there. I asked him if he wanted another furnace in his bedroom, & he said that it was not necessary since he did not spend a lot of time in there. I just watch him & admire his strength, despite the fact that I wish he would keep himself a little warmer.
Air purification help